Ms Haley also said the US could cut off trade with countries which continued to trade with North Korea in violation of UN resolutions.

"We will look at any country that chooses to do business with this outlaw regime," she said.

Earlier, US President Donald Trump criticised China for its trade with North Korea.

Mr Trump has arrived in Warsaw where he is due to meet Chinese President Xi Jinping for the second time. He will later travel to Hamburg for the G20 summit, where world leaders are expected to discuss the missile test.